Fix ClangTidy complaint about function definitions in headers.

Previously this was static, but we are splitting the code out
into separate translation units so we can no longer do this.
ClangTidy recommends `inline` here but the suggestion is wrong.

Change-Id: I4ab9e487236f33a6985b3e1abc24b092d9196248
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/780577
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/Transform_inl.h b/src/Transform_inl.h
index 1158a63..3585f59 100644
--- a/src/Transform_inl.h
+++ b/src/Transform_inl.h
@@ -1449,6 +1449,7 @@
     }
 }
 
+// NOLINTNEXTLINE(misc-definitions-in-headers)
 void run_program(const Op* program, const void** contexts, ptrdiff_t /*programSize*/,
                  const char* src, char* dst, int n,
                  const size_t src_bpp, const size_t dst_bpp) {